1. (adverb)in return, reciprocally (often followed by `for') in exchange or in reciprocation "gave up our seats on the plane and in return received several hundred dollars and seats on the next plane out"; "we get many benefits in return for our taxes"
2. (adverb)mutually, reciprocally in a mutual or shared manner "the agreement was mutually satisfactory"; "the goals of the negotiators were not reciprocally exclusive"
3. (adverb)inversely, reciprocally in an inverse or contrarymanner "inversely related"; "wavelength and frequency are, of course, related reciprocally"- F.A.Geldard